Tekmar Controls 521 Thermostat 318172-701 two flashes indicate a pressure

two flashes indicate a pressure switch fault

Enhanced System Logic: Restores full functionality to specialized operational modes including auto-restart and dehumidification

Manual Override: Features an external push button to disengage the gear train for manual adjustment during commissioning or maintenance

effectively reducing vibrational harmonics that can lead to premature motor failure

Common Technical Questions What is the LRA rating for the ZR44K5E-PFV-800

Tekmar Controls 521 Thermostat 318172-701 two flashes indicate a pressureThe Tekmar 521 Programmable Thermostat is a versatile microprocessor based control designed for precise single stage heating, two stage heating with fan, or one stage heating one stage cooling applications. Engineered for 24V AC DC systems, this unit supports hydronic radiant floor heating, baseboard convection, and forced air systems. The 7 day programmable schedule allows for four distinct events per day, optimizing energy cycles without